| Parameter |
Values |
| BCG |
CR |
MO |
| pH |
3.0 |
5.0 |
2.5 |
| Extracting solvent |
chloroform |
Chloroform |
chloroform |
| λmax |
420 |
515 |
480 |
| Molar ratio (SUL : Dye) |
1 : 1 |
1 : 1 |
1 : 1 |
| Beer’s law limits (μg/mL) |
2 – 14 |
2 – 16 |
2 -14 |
| Molar absorptivity (L mol-1cm-1) |
4.1×104 |
2.1×104 |
3.5×104 |
| Sandell’s sensitivity (ng cm-2) |
10.2 |
26.3 |
12.3 |
| Range of error % |
0.74 : -0.60 |
0.51 : 0.24 |
0.86 : -0.91 |
| Regression equation* |
|
|
|
| Intercept |
0.236 ± 0.0018 |
0.184 ± 0.0022 |
0.016 ± 0.002 |
| Slope |
0.098 ± 0.003 |
0.038 ± 0.002 |
0.081 ± 0.003 |
| Correlation coefficient (r) |
0.9990 |
0.9991 |
0.9998 |
| Limit of quantification (μg/mL) |
0.15 |
0.30 |
0.20 |
| Limit of detection (μg/mL) |
0.044 |
0.095 |
0.064 |
| pkf |
5.50 |
4.25 |
4.80 |
*A=a+bC, where C is the concentration in μg/mL